include/xen/xen-ops.h

   1 #ifndef INCLUDE_XEN_OPS_H
   2 #define INCLUDE_XEN_OPS_H
   3
   4 #include <linux/percpu.h>
   5 #include <linux/notifier.h>
   6 #include <linux/efi.h>
   7 #include <asm/xen/interface.h>
   8 #include <xen/interface/vcpu.h>
   9
  10 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
  11
  12 DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
  13 static inline uint32_t xen_vcpu_nr(int cpu)
  14 {
  15         return per_cpu(xen_vcpu_id, cpu);
  16 }
  17
  18 #define XEN_VCPU_ID_INVALID U32_MAX
  19
  20 void xen_arch_pre_suspend(void);
  21 void xen_arch_post_suspend(int suspend_cancelled);
  22
  23 void xen_timer_resume(void);
  24 void xen_arch_resume(void);
  25 void xen_arch_suspend(void);
  26
  27 void xen_reboot(int reason);
  28
  29 void xen_resume_notifier_register(struct notifier_block *nb);
  30 void xen_resume_notifier_unregister(struct notifier_block *nb);
  31
  32 bool xen_vcpu_stolen(int vcpu);
  33 void xen_setup_runstate_info(int cpu);
  34 void xen_time_setup_guest(void);
  35 void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
  36 u64 xen_steal_clock(int cpu);
  37
  38 int xen_setup_shutdown_event(void);
  39
  40 extern unsigned long *xen_contiguous_bitmap;
  41
  42 #ifdef CONFIG_XEN_PV
  43 int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
  44                                 unsigned int address_bits,
  45                                 dma_addr_t *dma_handle);
  46
  47 void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
  48 #else
  49 static inline int xen_create_contiguous_region(phys_addr_t pstart,
  50                                                unsigned int order,
  51                                                unsigned int address_bits,
  52                                                dma_addr_t *dma_handle)
  53 {
  54         return 0;
  55 }
  56
  57 static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
  58                                                  unsigned int order) { }
  59 #endif
  60
  61 struct vm_area_struct;
  62
  63 /*
  64  * xen_remap_domain_gfn_array() - map an array of foreign frames
  65  * @vma:     VMA to map the pages into
  66  * @addr:    Address at which to map the pages
  67  * @gfn:     Array of GFNs to map
  68  * @nr:      Number entries in the GFN array
  69  * @err_ptr: Returns per-GFN error status.
  70  * @prot:    page protection mask
  71  * @domid:   Domain owning the pages
  72  * @pages:   Array of pages if this domain has an auto-translated physmap
  73  *
  74  * @gfn and @err_ptr may point to the same buffer, the GFNs will be
  75  * overwritten by the error codes after they are mapped.
  76  *
  77  * Returns the number of successfully mapped frames, or a -ve error
  78  * code.
  79  */
  80 int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
  81                                unsigned long addr,
  82                                xen_pfn_t *gfn, int nr,
  83                                int *err_ptr, pgprot_t prot,
  84                                unsigned domid,
  85                                struct page **pages);
  86
  87 /* xen_remap_domain_gfn_range() - map a range of foreign frames
  88  * @vma:     VMA to map the pages into
  89  * @addr:    Address at which to map the pages
  90  * @gfn:     First GFN to map.
  91  * @nr:      Number frames to map
  92  * @prot:    page protection mask
  93  * @domid:   Domain owning the pages
  94  * @pages:   Array of pages if this domain has an auto-translated physmap
  95  *
  96  * Returns the number of successfully mapped frames, or a -ve error
  97  * code.
  98  */
  99 int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
 100                                unsigned long addr,
 101                                xen_pfn_t gfn, int nr,
 102                                pgprot_t prot, unsigned domid,
 103                                struct page **pages);
 104 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 105                                int numpgs, struct page **pages);
 106 int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
 107                               unsigned long addr,
 108                               xen_pfn_t *gfn, int nr,
 109                               int *err_ptr, pgprot_t prot,
 110                               unsigned domid,
 111                               struct page **pages);
 112 int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
 113                               int nr, struct page **pages);
 114 int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
 115                                   unsigned long nr_grant_frames);
 116
 117 bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
 118
 119 efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
 120 efi_status_t xen_efi_set_time(efi_time_t *tm);
 121 efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
 122                                      efi_time_t *tm);
 123 efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
 124 efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
 125                                   u32 *attr, unsigned long *data_size,
 126                                   void *data);
 127 efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
 128                                        efi_char16_t *name, efi_guid_t *vendor);
 129 efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
 130                                   u32 attr, unsigned long data_size,
 131                                   void *data);
 132 efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
 133                                          u64 *remaining_space,
 134                                          u64 *max_variable_size);
 135 efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
 136 efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
 137                                     unsigned long count, unsigned long sg_list);
 138 efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
 139                                         unsigned long count, u64 *max_size,
 140                                         int *reset_type);
 141 void xen_efi_reset_system(int reset_type, efi_status_t status,
 142                           unsigned long data_size, efi_char16_t *data);
 143
 144
 145 #ifdef CONFIG_PREEMPT
 146
 147 static inline void xen_preemptible_hcall_begin(void)
 148 {
 149 }
 150
 151 static inline void xen_preemptible_hcall_end(void)
 152 {
 153 }
 154
 155 #else
 156
 157 DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
 158
 159 static inline void xen_preemptible_hcall_begin(void)
 160 {
 161         __this_cpu_write(xen_in_preemptible_hcall, true);
 162 }
 163
 164 static inline void xen_preemptible_hcall_end(void)
 165 {
 166         __this_cpu_write(xen_in_preemptible_hcall, false);
 167 }
 168
 169 #endif /* CONFIG_PREEMPT */
 170
 171 #endif /* INCLUDE_XEN_OPS_H */